CITIZEN FINEDEVICE CO.,LTD.
Most recent update: 2025-11-01
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PR message
Supporting our products is our unique core technologies such as precision cutting parts processing technology, thin film technology, brittle material processing technology, assembly technology, and sealing technology, cultivated over many years. We cater to various needs from electronic parts to medical/bio and watch fields. Our main businesses are divided into five parts: devices, automobiles, motors, watches, and industrial equipment.
★Please check and follow our "LinkedIn"
We post about our products, company information, and events!
https://www.linkedin.com/company/citizen-finedevice-co-ltd/?viewAsMember=true
★Here is our corporate PR video 2024 that gives you a feel of our company's atmosphere. Please have a look.
https://youtu.be/5mDq6kTo1LE?feature=shared
Business: Automotive parts, crystal oscillators, crystal oscillators and crystal flakes, video electronic devices, liquid crystal display devices, optical device parts, optical communication parts, industrial machinery and equipment, small precision metalworking parts, etc. We are involved in various fields.
◆One-stop sales 【Crystal products】
We can sell crystal products from processing to assembly in one stop.
We can sell crystal wafers, crystal flakes, and finished products separately.
◆Production from material to processing 【Ceramic products】
We purchase bearings and magnets used in watches from materials and produce them as proce ssed products.
We process from granulation to molding and firing and finish.
●Possible application products
We are expanding horizontally using our processing technology, such as using ceramic products for watches for computer cooling fans.
◆All technologies are assembled 【MEMS products】
This is a product that can meet all customer needs by integrating the "microfabrication, functional thin film, molding, and bonding technologies" we have.
Our strengths include bonding and sealing of dissimilar materials and vacuum sealing.
●We accept processing orders Our MEMS foundry accepts all or part of the processing orders from our customers using the above technologies.
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Utilizing our metalworking technology that creates small precision parts rooted in watchmaking, our company has been supplying customers with small, high-precision parts for many years, through consistent production lines from process design to processing, assembly, and functional testing, and the unique development of our own processing machines.
Also, producing parts efficiently with high precision using brittle materials is another unique core technology of our company. By integrating materials technology, ultra-precision machining technology, thin film technology, and bonding technology, we are creating high-quality functional device products such as high-precision parts made of ceramics and crystals, as well as liquid crystal devices and sensing devices.
Continuing to provide products with high added value to the market is a great dream of our employees. Towards the realization of that dream, we contribute to the creation of new value through manufacturing driven by each individual's spirit of challenge.
Our OpECS (Optical Probe Current Sensor) is a current sensor that uses an optical probe. It allows for accurate measurement of high-frequency, high-current power semiconductor currents without the need for clamping. OpECS is primarily designed for high-precision current measurement and is used mainly for monitoring electrical equipment and power systems.
◆What is OpECS?
Our OpECS is designed to provide precise current measurements, especially for monitoring electrical equipment and power systems. It offers a range of features that make it a standout choice for various applications.
◆Key Features:
●Non-Contact Measurement:
The use of an optical probe allows for current measurement without direct contact with the conductor. This enhances safety and minimizes the impact on the circuit during measurement.
●High Precision:
Leveraging optical technology, OpECS achieves high measurement accuracy, making it suitable for applications requiring stringent current management.
●Wide Range of Applications:
OpECS can be used in power supply systems, industrial equipment, research and development, and more.
●Compact Design:
Its small size and ease of handling make it easy to install even in tight spaces.
◆Applications:
●Monitoring and diagnosing power systems
●Evaluating the performance of industrial equipment
●Measuring currents in research and development
With OpECS, you can measure currents simply by bringing the sensor close to the target, making it perfect for high-voltage and hazardous areas like substations, as well as intricate parts where clamping is not feasible.
For more details, check out our YouTube videos and catalog:
"What is OpECS?": https://youtu.be/EezVpLSOcpE?feature
"How to Use OpECS": https://youtu.be/J1M-rfNtzXE?feature=shared
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Contact Information:
Citizen Finedevice Co., Ltd. Miyota Office
4107-5 Oaza Miyota, Miyota-machi, Kitasaku-gun, Nagano 389-0295, Japan
Contact: Kobayashi
Email: kobayashinon@citizen.co.jp
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For inquiries via our website, please mention "Inquiry from Emidas."
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Tuning Fork Crystal Units is a crystal device product suitable for mobile devices due to its low power consumption.
Our crystals have been used in Citizen watches for nearly 50 years, ensuring reliable quality and trustworthiness.
↓ You can download a document from following URL ↓
https://en.nc-net.or.jp/company/101834/dl/catalog/k/8f34d94023fcc76b13d939ddd7e38f01
Contributes to timing sontrol and power effciency across a wide range of fields.
◆Applications
●Industry
Smart Meters, Factory Automation, POS
●PC/OA
PC, Tablet, Data Server, Printer
●Data Communication
Smart Phone, IoT Module, Asset Tracking
●In-Vehicle
EV Charging System, Infotainment, ADAS
●Consumer
Major Appliance, Audio Equipment, Clock and Watch
It has low CI and CL, contributing to battery life.
We can supply it from cylinder to SMD type.
It is lead-free and environmentally friendly.
◆Features
Can be used as a clock source for mobile devices and various other devices.
Suitable for high-density mounting due to high mounting efficiency (ultra-small surface-mount type)
Ceramic package (ceramic type)
RoHS compliant
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Contact: Kobayashi or Inomata
Mail: kobayashinon@citizen.co.jp / inomatat@citizen.co.jp
※For inquiries from our website, please add "Inquiry from EMIDAS" in the details section.
https://cfd.citizen.co.jp/english/inquiry_english
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CITIZEN FINEDEVICE CO.,LTD.
Postal code: 389-0295
Address: 4107-5 Oyada, Minamisaku-gun, Miyota-machi, Nagano Prefecture, Japan
- MEMS foundry -
Integrated production is available!
We provide integrated services from design and molding to bonding and inspection of microfluidic channels! Do you have trouble with small-lot prototyping to mass production of products?
For more information, please visit the following URLs.
◆Technologies
Bonding and sealing: Bonding and sealing of dissimilar materials
Example: Ceramic package and glass lid are sealed by AuSn bonding.
Microfabrication: High-precision fabrication using photolithography technology
Example: Processing of silicon molds, etc.
◆Features
Functional thin film
One-stop service from wafer process to mounting
✓What is MEMS? ～What is MEMS? - Citizen Fine Device's concept of MEMS
https://en.nc-net.or.jp/company/101834/product/detail/218151/
★Our othe products and technologies utilizing our MEMS technology
✓Microfabrication (front-end process) - Integrated support from prototyping to mass production
https://en.nc-net.or.jp/company/101834/product/detail/222871/
✓Encapsulation bonding (back-end process) - Integrated manufacturing from mounting to packaging (bonding of dissimilar materials) -]
https://en.nc-net.or.jp/company/101834/product/detail/200409/
We provide encapsulation (hermetic sealing, vacuum sealing, N2 sealing) mounted in high vacuum with various variations.
✓MEMS micro fixture
https://en.nc-net.or.jp/company/101834/product/detail/208445/
Providing high precision, high rigidity, high flatness and high aspect ratio jigs.
✓Microfluidics - Integrated services from design and molding to bonding and inspection.
https://en.nc-net.or.jp/company/101834/product/detail/200636/
✓Microplate (Medical inspection plate)
https://en.nc-net.or.jp/company/101834/product/detail/200632/
We offer a variety of base materials, anchor functions, and shapes to meet your application needs.
=============================================-
*For inquiries, please contact
Ms. Kobayashi
Email: kobayashinon@citizen.co.jp
company : Citizen Fine Device Co., Ltd.
location : Miyota, Nagano Prefecture
For inquiries through the contact form on our website, please kindly include "Inquiry from Emidas" in the additional notes.
Related URL: https://cfd.citizen.co.jp/english/inquiry/
We design and propose processes tailored to meet your needs and provide comprehensive support from prototyping to mass production.
Our semiconductor process capabilities are extensive, allowing us to handle substrates with gold (Au) plating, polyimide, and other materials without concerns about contamination. Additionally, with over 20 years of experience in MEMS manufacturing, we can process various substrates such as quartz, silicon (Si), and ceramics.
◆ Features
✓Design and proposal of processes tailored to meet your needs
✓Wafer sizes up to 6 inches
✓Photolithography...
✓Thin film deposition...
✓Dry etching...
✓Wet etching...
✓Tapered etching at 60°, 90°
and more We can achieve challenging shapes and high precision in mechanical processing.
We offer contract manufacturing services for MEMS mirrors, various sensors, optical communication boards, silicon photonics, and more. Our products are adopted in communication, medical, factory automation (FA) equipment, and automotive applications.
★ Other MEMS technical / product page
Encapsulation Bonding Technology (Post-process) - Consistent manufacturing from implementation to packaging possible (Dissimilar Material Bonding)
https://en.nc-net.or.jp/company/101834/product/detail/200409/
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*For inquiries, please contact
Ms. Kobayashi
Email: kobayashinon@citizen.co.jp
company : Citizen Fine Device Co., Ltd.
location : Miyota, Nagano Prefecture
For inquiries through the contact form on our website, please kindly include "Inquiry from Emidas" in the additional notes.
◎Capable of integrated production!
Ceramic parts with light weight, abrasion resistance, and environmental resistance as an alternative to metal parts! Dimensional accuracy up to ±0.3μm is possible.
Features
Integrated production from raw material blending and granulation to molding, firing and processing.
Dimensional accuracy up to ±0.3μm is available.
Lighter weight and stronger abrasion resistance than metal
Specifications to meet a wide range of applications
◆Other Features
・Handling ceramics for many years
・Achievements as a bearing manufacturer
・Use of granulation technology, near-net-shape, press powder molding, extrusion molding and CIP molding technologies
・Precision machining and finishing to produce parts and bearings of ceramics with sub-micron dimensional accuracy that cannot be handled by commercial products
Bearing hole diameter accuracy of ±0.3μm is possible.
・Surface roughness and dimensional accuracy of Ra0.03μm or less are available.
★Related pages
・Micro parts: Manufacturing of micro-shaped parts
https://en.nc-net.or.jp/company/101834/product/detail/225919/
・What is Ceramics?
https://www.nc-net.or.jp/company/101834/product/detail/218619/
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*For inquiries, please contact
Ms. Kobayashi/Mr.Inomata
kobayashinon@citizen.co.jp
inomatat@citizen.co.jp
company : Citizen Fine Device Co., Ltd.
location : Miyota, Nagano Prefecture
For inquiries through the contact form on our website, please kindly include "Inquiry from Emidas" in the additional notes.
Related URL: https://cfd.citizen.co.jp/junction/
Applying film deposition and thin-film processing technologies to submounts, for which demand is increasing!
We have applied and developed our thin-film deposition and thin-film processing technologies cultivated through the manufacture of thin-film magnetic heads (HDD and FDD) and optical prism components to form thin-film electrodes, resistor films, solder films, etc. with high-precision fine circuit patterns that match the base materials of ceramic substrates and other substrates.
We can also handle patterning on three-dimensional surfaces and thick Cu plating.
Applications
Laser diode (LD) mounting substrates
Light emitting diode (LED) mounting substrates
Photodiode (PD) mounting substrates
Laser market applications
Optical storage (BD, DVD, CD)
Optical communications (FTTx, data centers, mobile base stations)
Consumer and industrial applications (sensors, LiDAR, laser processing, medical)
Lighting (projectors, automobile headlights), etc.
Standard substrate materials (thermal conductivity W/m-K)
AlN (170~230)
AlN/Cu (~270)
SiC (~370)
Derivatives
Specimen Plate
Galvano Scanner Mirror
◆Galvanometer scanner is here
https://en.nc-net.or.jp/company/101834/product/detail/216135/
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*For inquiries, please contact
Ms. Kobayashi
kobayashinon@citizen.co.jp
company : Citizen Fine Device Co., Ltd.
location : Miyota, Nagano Prefecture
For inquiries through the contact form on our website, please kindly include "Inquiry from Emidas" in the additional notes.
We are capable of bonding different materials such as lenses and SUS, glass cells and SUS, and quartz glass.
We offer consistent manufacturing from implementation to packaging.
We have the technical expertise to design our own bonding and sealing equipment (hardware and software).
With our customized sealing equipment, we can accommodate a wide range of product sizes, up to □20mm.
We can also control the internal pressure according to specific requirements.
◆ Example Applications
✓Physical Sensors: Size: □15mm × 3mmT
✓Optical Sensors: Size: □10mm × 2mmT
✓Pressure Sensors: Size: Several mm × 0.8mmT
✓Other Implementations: Wire bonding, die bonding, etc.
✓Glass to metal
✓Ceramics to metal
✓Alumina to metal
✓Si to metal
✓Metal to metal
◆ Technology
・Strong bonding achieved through metal fusion by heat treatment
・Gapless sealing achieved through uniform fusion
・Strong bonding achieved through stable dissolution
・Achieving uniform metal fusion through processing at high temperature and high vacuum
・Using metals for high chemical resistance, suitable for bonding in medical devices
・Using plating to specify the bonding area and achieve high bonding accuracy
◆ Features
・Good dimensional accuracy
・No clearance requirement
・Multiple simultaneous processing regardless of directionality
・Resistant to thermal degradation
・Strong chemical resistance and water resistance (e.g., sodium hypochlorite)
・Capable of maintaining high vacuum air-tightness
★ Other MEMS technical / product page
Microfabrication (pre-process) - Consistent support from prototyping to mass production
https://en.nc-net.or.jp/company/101834/product/detail/222871/
=============================================-
*For inquiries, please contact
Ms. Kobayashi
Email: kobayashinon@citizen.co.jp
company : Citizen Fine Device Co., Ltd.
location : Miyota, Nagano Prefecture
For inquiries through the contact form on our website, please kindly include "Inquiry from Emidas" in the additional notes.
We use the brittle material processing technology we have cultivated over many years to finish samarium cobalt magnets, which are difficult to process, to a high degree of precision.
We specialize in cylindrical ultra-small magnets with an outer diameter of 1.5 mm or less and a diameter of 0.7 mm for smaller magnets.
We use brittle processing technology to suppress chipping and cracking, and finish with an inside/outside tolerance of ±0.005mm, enabling us to deliver stable, high-quality magnets.
We will respond to customers' requests to the maximum extent possible with the technology and skills we have cultivated over many years, including material grinding, mixing, forming, sintering, processing, and inspection.
◆Features and technologies
We can produce small cylindrical magnets of 2mm dia. or less.
We can produce magnets with dimensional accuracy of microns, which is not possible with commercially available products.
We can produce anisotropic sintered magnet products using magnetic field forming equipment.
Plating treatment is also available upon request.
Applications
Wristwatch motors
Magnetic sensors
Motor
Micro-switches
Optical isolators
Electric relays (electric circuit relays)
Headphones
Actuators
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*For inquiries, please contact
Ms. Kobayashi/Mr.Inomata
kobayashinon@citizen.co.jp
inomatat@citizen.co.jp
company : Citizen Fine Device Co., Ltd.
location : Miyota, Nagano Prefecture
For inquiries through the contact form on our website, please kindly include "Inquiry from Emidas" in the additional notes.
https://cfd.citizen.co.jp/inquiry_japanese
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Energy-saving machinery designing（ Designing / Industrial equipment designing ） |
|---|
| Company name | CITIZEN FINEDEVICE CO.,LTD. | Website URL | https://cfd.citizen.co.jp/english/ |
|---|---|---|---|
| Street address |
Miyota-machi, Kitasaku-gun Yamanashi Japan
[See map] |
Person in charge | Nonoka Kobayashi |
| Telephone number | Log in to display | Fax number | |
| Capital | 1,753,120,000 JPY | Employees | 909 |
| Annual sales | Unregister | EMIDAS Member Number | 101834 |
| Type of manufacturing | Office automation equipment / Electronic parts / Medical equipment | ||
| Main 3 products |
|
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| Large | Medium | Small |
|---|---|---|
| Designing | Mold designing | Injection molding die Drawing metal press die designing Transfer press die designing General metal press die |
| Designing | Product and part designing | Medical equipment designing Measurement/testing device designing |
| Designing | Jig and tool designing | Mass production jig designing |
| Designing | Test | Nondestructive test Investigative research |
| Designing | Industrial equipment designing | Automatic machinery manufacturing Carrier machine designing Precision automatic machinery designing Industrial machinery designing Energy-saving machinery designing |
| Designing | Electrical planning | Electrical machinery and apparatus designing Other electronic part designing Eletronic circuit designing |
| Designing | Simulation | CAE fluid analysis Resin |
| Development and production of prototype/Small-scale production | Machining | Deep hole drilling Gear hobber Thread-cutting Machining/Handles small-scale production (order from 1 piece) Iron Stainless steel Aluminum alloy Copper alloy Titanium alloy Nickel alloy Molybdenum alloy Keyway milling Automatic lathe Handles microfabrication Honing Titanium Brass |
| Development and production of prototype/Small-scale production | NC machining | NC lathe machining Combined lathe machining |
| Development and production of prototype/Small-scale production | Electrical discharge machine | Micro hole machining |
| Development and production of prototype/Small-scale production | Grinding processing | NC plane grinding NC cylindrical grinding Plane grinding Cylindrical grinding Internal grinding Centerless grinding NC internal grinding |
| Development and production of prototype/Small-scale production | Prototype processing | Small-size prototype manufacturing Prototype/Small-lot molding prototype mold |
| Die manufacturing | Press die | Designing Part processing Below 60 t 60 - 300 t |
| Die manufacturing | Plastic mold | Designing Manufacturing Part processing Injection molding die Thixo-molding die Insert molding die Below 60 t Thermoset resin die Light guide plate molding die manufacturing Aspherical lens molding die manufacturing |
| Die manufacturing | Forging die | Designing |
| Mass production | Metal press | Fine blanking Coining Transfer press (below 80 t) |
| Mass production | Mechanical processing | NC turning machining Tapping machining Complex turning machining Gear cutting machining Screw cutting machining Micro-hole machining Electrical discharge machining Iron Stainless Aluminum alloy Copper alloy Titanium alloy Nickel alloy Automatic screw machining Air chuck equipment Titanium Fine particle material accepted Ultra-thin High precision |
| Mass production | Plastic | Insert molding Thixo-molding Engineering plastic PI (polyimide) Thermoset resin GFRP (glass fiber reinforced plastic) PU (polyurethane) 60 - 300 t Injection molding Thin wall molding Dual molding plating Painting precision Sheet / film processing |
| Mass production | Forging | Cold forging |
| Mass production | Grinding processing | NC plane grinding NC cylindrical grinding Centerless grinding NC internal grinding |
| Surface treatment | Plating/Chemical conversion treatment | Electroless nickel (barrel) Chemical conversion coating Iron Copper Brass Stainless steel Other anti-rust treatments Degreasing |
| Surface treatment | Cleaning | Hydrocarbon cleaning |
| Surface treatment | Polishing/Lapping | Electropolishing Chemical polishing Brush polishing |
| Surface treatment | Printing and others | Laser engraving |
| Surface treatment | Heat treatment | Annealing Quenching Air quenching Vacuum quenching Sub-zero treatment Carburized quenching |
| Surface treatment | Barrel polishing | Barrel finishing (rotation) |
| Surface treatment | Other surface treatment | Vacuum deposition Other physical vapor deposition methods (PVD) CVD (chemical vapor deposition) Spattering Shot blast Sound blast Etching (surface treatment) Ionized plating Thermal oxidation Deburring |
| Assembly/Inspection | Assembly | Precision equipment assembly Auto parts assembly Industrial machinery assembly |
| Assembly/Inspection | Inspection | Metal press Plastic Forging Casting Powder metallurgy Rubber Glass Spring Bolt/Screw/Nut Measuring |
| Parts manufacturing | Machinery part | Gear manufacturing Valve manufacturing Vacuum components manufacturing Connection parts manufacturing Optical parts manufacturing Shaft and roller manufacturing |
| Parts manufacturing | Electrical part | Coil manufacturing |
| Auto parts manufacturing | Drive system part | Brake parts |
| Auto parts manufacturing | Engine | Fuel system |
| Product manufacturing | Production property | Measurement/testing devices manufacturing Semiconductor manufacturing equipment manufacturing |
